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UNITED STATES PATENT Orrres.

GEORGE E. BRETTELL, OF ROCHESTER, NEW YORK, ASSIGNOR OF ONE- THIRD TO WILLIAM A. WILSON, OF SAME PLACE.

AUTOMATIC FUEL-REGULATOR FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 383,557, dated May 29, 1888.

Application filed August 8, 1887. Serial No. 246,379. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE E. BRETIELL, a citizen of the United States,residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Apparatus for Regulating the Feed of Fuel to Steam-Boiler Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to apparatus for regulating the feed of fuel to the furnace of a steam-boiler; and it consists in the novel construction of the parts hereinafter fully de scribed and claimed.

Figure 1 in the drawings shows a side view of the device, partly in section and attached to a steam-boiler. Fig. 2 is a side view of the device, taken at right angles to the position shown in Fig. 1, and showing the expansionpipe partly in section.

A is the boiler, which may be of any approved construction, and B is the boiler-furnace, suitable for burning liquid, gaseous, or finely-pulverized fuel.

0 is the fuel-supply pipe, and D is a valve, which is preferably a balanced valve, and which controls the feed of the fuel through the pipe into the furnace.

E is a valve-casing secured to the upper part of the boiler, and F is avalve, something like an ordinary safety-valve,which covers the hole in the casing and prevents the escape of steam when down on its seat.

G is a lever provided with the adjustable weight H. This lever is pivoted by the pin I to the casing, and is provided with the pivoted spindle J which bears upon the valve.

K is the vertical brass expansion-pipe, the lower end of which is bent around and connected to the valve-casing above the valve, so that the steam may enter the said pipe when the valve is raised.

L is a small cock at the top of the pipe, forming an adjustable outlet for the steam and condensed water.

M is an arm secured to the upper end of the brass pipe.

N is a lever pivoted to the valvecasing by casing by the pin S. The short arm of this lever is pivoted to the end of the plunger, and the long arm is provided with the adjustable weight T.

U is the spindletof the valve D, which regulates the feed of the fuel to the boiler-fur news. This spindle is provided with the ad justable tappets V and W, which are actuated by the levers N and B, respectively.

The operation of the device is as follows: The fuel is forced or is allowed to how through the supply-pipe and its valve, and is burned in the boiler-furnace, generating steam within the boiler. When the pressurein the boiler reaches its maximum and it is required to diminish the supply of fuel, the valve F lifts and allows the steam to flow into the brass expansion-pipe. The steam condensing in the pipe'is driven out at the cock at the top ofit, and the heat of the steam expands the pipe lengthwise and raises the lever N by means of the link P. The free end of lever N raises the tappetV and partially or wholly closes the valve D, according to the adjustment of the tappet. When the supply of fuel is deficient and the pressure falls, the steam no longer supports the plunger Q against the downward pressure of the weight T. The said weight depresses the long arm of the bell-crank lever, which pushes down the tappet W and allows a more liberal supply of fuel to pass through the pipe to the boiler-furnace.

What I claim is- 1. The combination,with asteam-boiler and its furnace, of a valve connected to the boiler and rising when the steam exceeds a given pressure, a valve for supplying fuel to the boilerfurnace, and a metallic pipe connected to the said steam-valve atone end. and having its other end connected to the fuel-supplyvalvespindle, whereby the expansion of the said pipe will close the fuel-supply valve when steam is admitted to the said pipe, substantially as set forth. 4

2. The combination,with a steam-boiler and sion of the said pipe will close the fuel-supply its furnace, of a valve connected to the boiler and rising when the steam exceeds a given pressure, a valve for supplying fuel to the boiler-furnace, and a metallic pipe connected to the said steam-valve at one end, and having its other end provided with an adjustable outlet for condensed water and connected to the fuel-supply-valve spindle,whereby the expanvalve when steam is admitted to the said pipe, substantially as set forth.

3. The combination,with a steam-boiler and its furnace, of a steam-valve easing connected to the boiler, the metallic expansion-pipe secured to the steam-valve casing, the weighted steam-valve seated in the said casing below the lower open end of the said pipe, a lever pivoted to the casing and connected to the upper end of the expansion-pipe,aplungerworking steam-tight within the casing below the valve, a weighted bell-crank lever pivoted to the said casing and to the end of the plunger, and the valve for regulating the feed of the fuel, provided with a stem and actuated by the free ends of the said levers, substantially as and for the purpose set forth.

4. The combination,with asteam-boiler and its furnace, of a steam-valve casing connected to the boiler, the metallic expansion-pipe secured to the steam-valve casing, the weighted steam-"alve seated in the said casing below the lower open end of the said pipe, a lever pivoted to the casing and connected to the upper end of the expansion-pipe, a plunger working steam-tight within the casing below the valve, 2. weighted bell-crank lever pivoted to the said casing and to the end of the plunger, the valve for regulating the feed of the fuel, provided with a stem, and the adjustable tappets secured upon the said stem and actuated by the free ends of the said levers, substantially as and for the purpose set forth.

5. The con1binati0n,with asteam-boiler and its furnace, ofa valve for supplying fuel to theboilerfurnace, and a metallic pipe rigidly supported at one end by the boiler and communicating with its steam-space, and having its other end connected to the fuel-supplyvalve spindle,whereby the feed of the fuel will be regulated and proportioned by the expansion and contraction of the said pipe, substantially as set forth.

In testimony whereof I affix my signature in presence'of two witnesses.

GEORGE E. BRETTELL. Witnesses:

GEo. R. HOAGLAND, EDWARD WEBsTER. 

